Pneumatic tube



FIG. 1 is a side elevational view of a pneumatic tube showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a fragmentary enlarged end elevational view taken along lines 5--5 of FIG. 1. 

The ornamental design for a pneumatic tube, substantially as shown. 